硫黄泉
Iou SpringOperated by · 霧島湯之谷山荘
黄
Sulfur
- Color
- pale white and clear
- Taste
- with a faint sediment taste
- Odor
- faint hydrogen sulfide
Sodium-Calcium Bicarbonate-Sulfate spring
pH 6.1Weakly acidicHot source · 47°CSulfur-richHigh silica
Composition fingerprint0.5 g/kg dissolved · Hypotonic
Na⁺62
Ca²⁺24
HCO₃⁻48
SO₄²⁻47
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A simple sulfur spring (hydrogen sulfide subtype) — pale, clear water with the unmistakable rotten-egg note of H₂S. Weakly acidic and gentle on the skin, with metasilicic acid at 127 mg/kg leaving the kind of silica film that makes skin feel noticeably smoother afterwards. The cert was sampled at the bath inlet of a free-flowing source delivering 148 L/min.
Sampled at bath inlet·Analyzed Sep 2, 2022·株式会社 東洋環境分析センター·Cert no. IZ2200059-001
